<template>
  <div>
    <!-- 工作日历, 年和月 -->
    <div class="select-box">
      <el-select v-model="currentYear" size="small" style="width: 120px; margin-right: 10px">
        <!-- 年份取给定年份的, 前五年 + 后五年 -->
        <el-option v-for="item in yearList" :key="item" :label="item" :value="item" />
      </el-select>
      <el-select v-model="currentMonth" size="small" style="width: 120px">
        <el-option v-for="item in 12" :key="item" :label="item" :value="item" />
      </el-select>
    </div>
    <el-calendar v-model="currentDate">
      <!-- 通过作用域插槽自定义单元格内容 -->
      <template #dateCell="{ date }">
        <div class="date-content">
          <!-- 几号 -->
          <span class="text">{{ date.getDate() }}</span>
          <!-- 如果是周六日显示 休 字 -->
          <span v-if="isWeek(date)" class="rest">休</span>
        </div>
      </template>
    </el-calendar>
  </div>
</template>

<script>
export default {
  name: 'WorkCalendar',
  props: {
    startDate: {
      type: Date,
      default: () => {
        return new Date()
      }
    }
  },
  data () {
    return {
      currentYear: null, // 当前年份
      currentMonth: null, // 当前月份
      // yearList: [] // 要遍历的年的数组
      currentDate: new Date()
    }
  },
  computed: {
    yearList () {
      const arr = []
      const year = this.startDate.getFullYear()
      for (let i = 0; i <= 10; i++) {
        arr.push(year - 5 + i)
      }
      return arr
      // 装B写法
      // return Array(11).fill(null).map((item, i) => this.startDate.getFullYear() - 5 + 1)
    }
  },
  watch: {
    // 侦听currentDate的变化，变了之后把最新的日期对象的年和月赋值给currentYear,currentMonth
    currentDate (newVal) {
      this.currentYear = newVal.getFullYear()
      this.currentMonth = newVal.getMonth() - 1
    }
  },
  created () {
    this.currentYear = this.startDate.getFullYear() // 得到当前年份
    this.currentMonth = this.startDate.getMonth() + 1 // 当前月份
  },
  methods: {
    isWeek (dt) {
      // 判断当前的日期是周几，如果在[0,6]的数组中，说明是周六周日
      return [0, 6].includes(dt.getDay())
    }
  }
}
</script>

<style lang="scss" scoped>
.select-box {
  display: flex;
  justify-content: flex-end;
}
</style>
<style lang="scss" scoped>
.select-box {
  display: flex;
  justify-content: flex-end;
}

::v-deep .el-calendar-day {
  height: auto;
}
::v-deep .el-calendar-table__row td::v-deep .el-calendar-table tr td:first-child,
::v-deep .el-calendar-table__row td.prev {
  border: none;
}
.date-content {
  height: 30px;
  text-align: center;
  line-height: 30px;
  font-size: 14px;
}
.date-content .rest {
  color: #fff;
  border-radius: 50%;
  background: rgb(250, 124, 77);
  width: 20px;
  height: 20px;
  line-height: 20px;
  display: inline-block;
  font-size: 12px;
  margin-left: 8px;
}
.date-content .text {
  width: 20px;
  height: 20px;
  line-height: 20px;
  display: inline-block;
}
::v-deep .el-calendar-table td.is-selected .text {
  background: #409eff;
  color: #fff;
  border-radius: 50%;
}
// ::v-deep,scss中样式穿透/deep/less中穿透
::v-deep .el-calendar__header {
  display: none;
}
</style>
